Twenty-two people have been killed and 59 injured in a suicide bombing at Manchester Arena at the end of a concert by US singer Ariana Grande.
A lone attacker set off a homemade bomb in the foyer at 22:33 BST on Monday in what Theresa May called an “appalling, sickening” terrorist act.
Armed police have arrested a 23-year-old man in Chorlton, south Manchester, in connection with the attack.
The first victim has been named as 18-year-old student Georgina Callander.
She was studying health and social care at Runshaw College in Leyland, Lancashire.